Seo Server – allows GoogleBot to crawl your Javascript built websites
seo.apiengine.ioThe website says it is "not released yet" but the concept seems quite straightforward. It uses PhantomJS to render the complete page and return it to GoogleBot.
The only issue I could see with this are slow response times because Google penalizes sites for being "slow." But definitely something to keep an eye on and/or contribute to.